National Industrial Conference Board. (1927). The cost of living in foreign countries.
Chicago-referens (17:e uppl.)National Industrial Conference Board. The Cost of Living in Foreign Countries. New York, 1927.
MLA-referens (8:e uppl.)National Industrial Conference Board. The Cost of Living in Foreign Countries. 1927.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.